Equipment is assumed to already have the discount for it being hard or easy to lose. Given you're not going to gain any additional vulnerability for having it be part of the suit, what are you gaining or losing by putting it inside that container?

Good point. I was looking at placing the utility belt within the armor with hidden compartments (subtle feat) combined with the limited feat (5 uses), but that's really more of a descriptor. Just effects-based (with your good point about the cost already factored in), it doesn't matter in which container the utility belt equipment is located.

Even better, if the utility belt is something physically outside the armor, there's no reason the character couldn't use that when he doesn't have access to his battlesuit.